Bad News: It’s a Big Lizard!!

According to a report noted in Evolving in Kansas, Komodo Dragons have been hatched in Sedgwick County without fertilization by a male.

There are two of them, both males. (Isn’t that interesting?) …

I think they should name them Jesus and Brian.


  1. #1 Brian
    February 9, 2008

    I thought that parthenogenesis always produced female offspring because the they would have inherited both x chromosomes from the mother.

  2. #2 Erp
    February 9, 2008

    Not all animals use the mammalian XX (female) XY (male) or the birds ZZ (male) and ZW (female)) to distinguish the sexes. I believe some reptiles use incubation temperature though others use chromosomes.

    for some info

    Note that in bees fertilized eggs become females (either queens or workers depending on diet) while unfertilized eggs become males (drones).

  3. #3 Gene Goldring
    February 9, 2008

    Biblical based exemptionalism sure is taking a beating.

  4. #4 Greg Laden
    February 9, 2008

    Reptiles’ sex determination is based on the temperature of incubation of the egg.

  5. #5 Brian
    February 9, 2008

    Interesting! Now that you say it, it seems like I’ve heard that somewhere before.

    I guess it would be possible for the zoo to determine the results by changing the temperature.